Dust piles up daily in Kanazawa dormitory

Hey guys

about 2 months ago I arrived to Kanazawa University and got a decent room provided by the uni. It’s a bit old but still satisfactory for my needs. However, it surprised me how much dust gathers and how quick it happens every day. I come from a very clean household so I got used to cleaning and tidyness, I vacuum and wipe (duster and wet) almost everyday to keep it clean but the next day I wake up my shelves have a new layer of dust and so does my phone and laptop screens. Also annoying is putting on clothes in the morning seeing a bunch of dust flying off of it as if I didn’t enter the room for months is ruining my days before they begin..

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I was wondering if anyone had this experience before and what I could do to help this. I do keep the door closed because of the hornets, but open it when I am at home. The toilet fan keeps on going and I use the dehumidifier as well. I was looking on Amazon to get an air purifier, because I’m a student my budget is not that high. I found some Air Purifiers that claim to deal with pollen, animal hairs, odor, etc etc. Would this help with my dust pile up on shelves and clothing?

I feel this cannot be healthy for me to live in a dusty envirnment.

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Thanks